import React from 'react'
import { NavLink, Outlet, useNavigate } from 'react-router-dom'
export default function Main() {
  const navigate = useNavigate()
  return (
    <div>
      <div>
        <div>
          <div className="row">
            <div className="col-xs-offset-2 col-xs-8">
              <br />
               <br />
              <button onClick={()=>{navigate(1)}}>前进</button>
              <button onClick={()=>{navigate(-1)}}>后退</button>
              <div className="page-header"><h2>React Router Demo</h2></div>
            </div>
          </div>
        </div>
        <div className="row">
          <div className="col-xs-2 col-xs-offset-2">
            <div className="list-group">
              <NavLink to='/main/about' className="list-group-item" href="./about.html" >About</NavLink>
              <NavLink to='/main/home' className="list-group-item " href="./home.html">Home</NavLink>
            </div>
          </div>
          <div className="col-xs-6">
            <div className="panel">
              <div className="panel-body">
                <Outlet />
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  )
}
